overlap: Overlap of two probability density functions

In phytomosaic/vuln: Niche-based Vulnerability of Species and Communities

Description

Calculate overlap of two probability density functions as their intersection. Can compare two 'niche' distributions.

Usage

overlap(a, b, buff = 0.05, na.rm = TRUE, ...)

Arguments

a	first vector of values
b	second vector of values, potentially of different length than a
buff	multiplier for buffer at tail ends, expressed as proportion of total data range; default is 0.05
na.rm	logical, remove NA values? Default is na.rm = TRUE.
...	further arguments passed to additional methods

Details

Overlap is calculated as two times the area under the intersection, divided by total area under both curves

Value

Numeric value for coefficient of overlap

See Also

https://stats.stackexchange.com/questions/97596/

Examples

set.seed(122)
N  <- 999
x1 <- rnorm(N)
x2 <- rnorm(N+99, 2) # lengths may differ
overlap(x1,x2)

phytomosaic/vuln documentation built on Sept. 21, 2019, 8:23 a.m.